Honda CR125R 1992 User Manual

17. Troubleshooting
Engin e Does Not St art Or Is Hard To Start 17 -1
Engine Lacks
Pow er 17 -2
Poor Performance
At High Speed
Poor Handling
17 -4
17 -4
Poor Performance
At Low
And Idle Spee
ds 17 -3
Engine Does Not Start Or Is Hard To Start
Possib le Ca use
1. Check the fuel flow to carburetor - Not Reaching Carburetor-- -----
Clogged fuel tube or fuel strainer
screen
Reaching Carburetor
Sticking float valve
Clogged fuel tank cap breather
i
2. Perform a spark test--- -- - ► Weak or No Spark-------- ---
Faulty spark plug
Good Spark
• Fouled
spark plug
Faulty COi unit
Broken or shorted spark plug wire
Broken or shorted ignition coil
Faulty pulse generator
• Faulty excitor coil
•
Faulty engine stop switch
Loose or disconnected ignition
system w ires
3. Test cylinder compression- ----, ► Low Compression-------- --• Stuck piston ring
Worn cy l inder and piston ring
Compression Normal Damaged cyli nder head gasket
j
Faulty reed valve
• Cylinder head flaw
• Compression l eak past crankcase
4 . Start by following normal-- - - -- Engine Starts But Stops------ • • Improper choke operation
procedure • Carburetor incorrect ly adjusted
Engine Does Not Fire
I
ntake pipe leaking
Improper ignit ion timing (Fau lty igni-
tion coil or pulse generator)
• Crankcase leaking
• Fuel conta minated
j
5. Remove and inspect spark plug - Wet Plug----------- - ►
Flooded carburetor or engine
Damaged starter valve seat
Dry !
• Clogged air cleaner
6 .
Star t with choke on
RICIERED
17-1
m

Honda CR125R 1992 Specifications

General

Bore x Stroke	54.0mm x 54.5mm
Compression Ratio	8.5:1
Transmission	5-speed
Front Brake	Single disc
Rear Brake	Single disc
Front Tire	80/100-21
Rear Tire	100/90-19
Ignition	CDI
Engine Type	Liquid-cooled, single-cylinder, two-stroke
Rear Suspension	Showa, Pro-Link, adjustable compression and rebound damping